Crystal structure of pilus-specific sortase from Enterococcus faecalis reveals both open and closed conformations: insights into loop dynamics and substrate recognition.
Aug 2026· Acta Crystallographica Section D: Structural Biology· Vol 82, pp. 947-961· 0 citations
Medicine
TL;DR
The unprecedented structural snapshots of both open and closed lid conformations, synchronized with the proline switch in the β7-β8 loop, captured in the same crystal structure, advance the understanding of sortase-mediated virulence in enterococci and provide a framework for the development of antivirulence strategies.
NMR data, in combination with enzymatic assays using active variants confirmed differences in the active, apo states of these enzymes, and provided additional atomic detail regarding the importance of the P94 residue in saSrtA substrate recognition.
Erich G. Walkenhauer, Noah Cox-Tigre, M. Chaubey et al.· bioRxiv· 0 citations
Sortase A (SrtA) enzymes covalently anchor surface proteins to Gram-positive bacterial cell walls, promoting colonization and virulence. In Streptococcus pneumoniae, previous studies identified both a domain-swapped dimer and an active refolded monomer, but the active enzyme has not been characterized at the structural...
Eunjeong Lee, Blaine H. Gordon, J. Redzic et al.· Biomolecules· 0 citations
Class III aminotransferases represent a structurally and functionally unique subgroup. However, the contribution of specific loop elements to their active-site architecture and cofactor-dependent structural transitions remain underexplored. We elucidated the structural framework underlying the catalytic function of cla...
Jisub Hwang, Hackwon Do, Jun Hyuck Lee· Crystals· 0 citations
Secreted proteases enable Pseudomonas aeruginosa to damage host tissues and evade host immune defences, but the molecular basis by which protease IV (PIV) is maintained as an inactive precursor remains unclear. Here we determined a 2.17 Å crystal structure of catalytically inactive PIVS409A. The precursor comprises an...
Christopher J. Harding, Carlin Hamill, Qing-Tian Gong et al.· bioRxiv· 0 citations
Key determinants of secretion specificity and endopilus stability are identified, revealing how minor sequence variations in conserved nanomachines drive functional adaptation to diverse environments.
Maylis Lejeune, S. Ivashchenko, Régine Dazzoni et al.· Structure· 0 citations
Given the involvement of S-layers in host interactions, immune evasion, and pathogenicity, particularly in Bacillusanthracis and Bacillus cereus group species, the identified intermolecular interfaces represent attractive targets for the development of novel antibacterial strategies.
Christoph Grininger, L. Gambelli, Anđela Ðordić et al.· Journal of Biological Chemis...· 0 citations
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